Hi Tony,
Thanks for getting in otuch and sorry to hear about this venue havoc ๐
Hopefully it’s possible to prevent users from creating venues. First you’ll need to set a default venue for the form to show, you can do this in WP-Admin > Events > Community > Form Defaults > Default venue for submitted events.
After that you can add this CSS snippet to hide the Use new venue option in the dropdown. You can add this snippet your theme functions.php file or via Simple Custom CSS plugin:
#saved_venue_chosen .chosen-results li:first-child {
display: none;
}
Please let me know if this helps,
Best,
Nico